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  • Question

  • Which curve represents the fidelity curve of a standard receiver?
    Which curve represents the fidelity curve of a standard receiver? Curve A Curve B Curve C Curve D


  • Options
  • A. Curve A
  • B. Curve B
  • C. Curve C
  • D. Curve D

  • Correct Answer
  • Curve C 

    • Radio Receivers problems

    Search Results

    • 1. Selectivity varies with receiving frequency, frequency is raised.

    • Options
    • A. Somewhat better when the receiving frequency is raised
    • B. Somewhat better at intermediate frequency
    • C. Somewhat worse when the receiving frequency is lowered
    • D. Somewhat worse when the receiving frequency is raised
      • Discuss
    • 2. Double spotting in a receiver is due to

    • Options
    • A. poor sensitivity of RF amplifier
    • B. high gain of IF amplifier
    • C. inadequate image frequency rejection
    • D. all of the above
      • Discuss
    • 3. Noise limiter is provided on AM receivers to

    • Options
    • A. reduce interfering noise due to ignition system
    • B. reduce noise due to electrical storms
    • C. reduce interference due to electrical machinery
    • D. all of the above
      • Discuss
    • 4. An arbitrary signal m (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is

    • Options
    • A. AM-DSB signal with suppressed carrier
    • B. AM-DSB signal with carrier
    • C. AM-SSB signal with carrier
    • D. a sequence of exponentially decaying sine waves
      • Discuss
    • 5. A communication channel with additive white Gaussian noise, has a bandwidth of 4 kHz and an SNR of 15. Its channel capacity is

    • Options
    • A. 1.6 kbps
    • B. 16 kbps
    • C. 32 kbps
    • D. 256 kbps
      • Discuss
    • 6. The passband of the tuned circuits of a radio receiver should be equal to

    • Options
    • A. 20 kHz
    • B. 455 kHz
    • C. 1455 kHz
    • D. more than 455 kHz
      • Discuss
    • 7. Which of the following circuit cannot be used to demodulate SSB?

    • Options
    • A. Phase discriminator
    • B. Produce detector
    • C. Balanced modulator
    • D. Beat frequency oscillator
      • Discuss
    • 8. When a superheterodyne receiver is tuned to 455 kHz, its local oscillator provides a mixer with the input at 1010 kHz. The image frequency is

    • Options
    • A. 555 kHz
    • B. 1010 kHz
    • C. 1465 kHz
    • D. 1920 kHz
      • Discuss
    • 9. RF amplifiers are used in radio receivers for

    • Options
    • A. better sensitivity
    • B. improved signal-to-noise ratio
    • C. better coupling of receiver to the antenna
    • D. all of the above
      • Discuss
    • 10. The selectivity curve of a standard receiver is represented by

    • Options
    • A. curve A
    • B. curve B
    • C. curve C
    • D. curve D
      • Discuss

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